bell jar

3 definitions found

bell jar - Collaborative International Dictionary of English v.0.48 :

  Jar \Jar\ (j[aum]r), n. [F. jarre, Sp. jarra, from Ar. jarrah
     ewer; cf. Pers. jarrah.]
     1. A deep, broad-mouthed vessel of earthenware or glass, for
        holding fruit, preserves, etc., or for ornamental
        purposes; as, a jar of honey; a rose jar. --Dryden.
        [1913 Webster]
  
     2. The measure of what is contained in a jar; as, a jar of
        oil; a jar of preserves.
        [1913 Webster]
  
     Bell jar, Leyden jar. See in the Vocabulary.
        [1913 Webster]

  Bell jar \Bell" jar`\ (Phys.)
     A glass vessel, varying in size, open at the bottom and
     closed at the top like a bell, and having a knob or handle at
     the top for lifting it. It is used for a great variety of
     purposes; as, with the air pump, and for holding gases, also
     for keeping the dust from articles exposed to view.
     [1913 Webster]

bell jar - WordNet (r) 2.1 (2005) :

  bell jar
      n 1: a bell-shaped glass cover used to protect and display
           delicate objects or to cover scientific apparatus or to
           contain gases [syn: bell jar, bell glass]